Error C2679 when reading in vector values

DESCRIPTION:

I'm working on a image editing program for school and can't seem to get rid of this error message. The program reads a ppm file, modifies it, and outputs a modified ppm file.

ERROR MESSAGE:

Error C2679 binary '>>': no operator found which takes a right-hand operand of type 'std::vector>,std::allocator>>>' (or there is no acceptable conversion)

RELEVANT CODE:

    #include <iostream>
    #include <fstream>
    #include <sstream>
    #include <string>
    #include <vector>
    using namespace std;

    ifstream fin;
    fin.open(infile);
    if (fin.fail()) {
        cerr << "Error opening input file '";
        cerr << infile << "', exiting!" << endl;
        return -1;
    } 

    string magic;
    int cols, rows, maxColor, red, green, blue, COLORS = 3;
    fin >> magic >> cols >> rows >> maxColor;

// TODO: read in columns/rows/depth header info; make a data structure
// rows x columns x 3 integers.

    vector<vector<vector<int>>> photo(rows, vector<vector<int>>(cols, vector<int>(COLORS)));

// TODO: read all of the image data into data structure.

    for (int r = 0; r < rows; r++) {
         for (int c = 0; c < cols; c++) {
             for (int i = 0; i < 3; i++) {
                 fin >> photo[r, c, i];           
             }
         }
     }

    // The error is under the last ">>" between fin and photo. 

Thanks in advance for your help everyone!!