[tex]\bf \stackrel{\textit{volume of a pyramid}}{V=\cfrac{Bh}{3}}\qquad \qquad \stackrel{\textit{volume of a rectangular prism}}{V=Bh}\qquad \begin{cases} B=base~area\\ h=height \end{cases}[/tex]
so let's notice, the volume of the rectangular prism is really 3 times as much of that of a pyramid with the same Base and Height.
so if the pyramid has a volume of 150, the prism will have volume of 3*150.
