Can someone please explain it to me why my answer is wrong??? I couldn't figure out where I did mistake?? This is Volume by Slicing

Find the volume of the solid generated in the following situation. The region R bounded by the graph of y = 5 sin x and the x-axis on [0, It] is revolved about the line y = - 5. The volume of the solid generated when R is revolved about the line y = - 5 is 2 -100 cubic units. (Type an exact answer, using it as needed.)