The height of pyramid is h = 215 ft.
The length of square base is a = 339 ft.
The formula for the volume of square pyramid is,
[tex]V=\frac{a^2h}{3}[/tex]Substitute the values in the formula to determine the volume of pyramid.
[tex]\begin{gathered} V=\frac{(339)^2\cdot215}{3} \\ =8,236,005 \end{gathered}[/tex]So volume of pyramid is 8,236,005 cubic feet.