The radius of a sphere is calculated through the equation, V = 4πr³ / 3 where r is the radius. Substituting the radius given in the equation, V = 4π x (3,760.4 miles)³ / 3 = 2.23 x 10^11 miles Thus, the volume of the planet Venus is calculated to be 2.23 x 10^11 miles, approximately.