Applications of Integration · Easy problem

A thin vase is formed by revolving $y=\sqrt{x}$ about the $x$-axis for $0\le x\le4$ (cm), using disks. A hemispherical bowl of radius $3$ cm is formed by revolving $y=\sqrt{9-x^2}$ about the $x$-axis for $0\le x\le3$. By how many cm$^3$ does the bowl's volume exceed the vase's volume?