Given, a pyramid with height = 480.7 ft
The base is a square and the length of the side = 756 ft.
We know that the formula to find the volume is

Here, h = 480.7 ft and a = 756 ft.
By substituting the values of a and h in the formula we will get,





So we have got the required answer.
The volume of the pyramid =
.
So option C is correct here.