Find the volume of the parallelepiped defined by the vectors $$\left[\begin{array}{c} 0\cr 1\cr 1\cr 3 \end{array}\right], \left[\begin{array}{c} -1\cr -1\cr 1\cr 2 \end{array}\right], \left[\begin{array}{c} -2\cr 2\cr 1\cr 0 \end{array}\right].$$ Volume = .