Answer:
Please, see the image below.
Step-by-step explanation:
I attached an image of the sketched region below.
You take into account that y=0 is the x axis.
Furthermore, you take into account that f(x)=-5x^3 is, for x=-2 and x=-1:
f(-2)=40
f(-1)=5
Finally, the region bounded by the equations is above the negative x axis.