3. A small toy in the shape of a right pyramid with a square base is floating 4 points in a pool of water. The height of the pyramid is 5 inches. One-third of this
height is above the surface of the water and two-thirds of it is below the
surface of the water. The square cross section of the pyramid at the
surface of the water has an area of 3.6 square inches. This cross section is
parallel to the base. What is the volume, in cubic inches, of the portion of
the pyramid that is above the water ? Enter your answer below*