Nestled deep in a particular rainforest, these wooden spheres, called "Free Spirit Spheres," are hung from the trees by small networks of ropes. The exterior of a sphere has a diameter of about 9 feet 10 inches. Find the volume of the exterior of the sphere to the nearest whole cubic inch. The volume of the exterior of a sphere is 3 in. (Simplify your answer. Round to the nearest whole number as needed.)