Incorrect. Find the volume of the cube and subtract the volume of the pyramid from it.

The volume of a cube is given by $\displaystyle{V}={{a}}^{{3}}\usepackage{cmbright}\Huge\$ and the volume of a pyramid is given by $\displaystyle{V}=\frac{{1}}{{3}}{l}{w}{h}\usepackage{cmbright}\Huge\$ . Because the height of the pyramid is the same height as the cube, you need to substitute the value 6 for all variables in the formulas.