The formula for the volume of a sphere is V = (4/3)Ï€r^3, where r is the radius.
Plugging in the given radius of 1.8 yards, we have V = (4/3)Ï€(1.8)^3.
Calculating this, we find V ≈ 24.01 cubic yards.
Therefore, the volume of the sphere is approximately 24.01 cubic yards.