Finding a CPU's Capacitive Load
This is a simple arranging to resolve the equation for Capacitive load. Like so 

\$
\frac{Power}{Voltage^2 \times frequency} = Capacitive Load \$

With the numbers you gave we get: 

\$
\frac{29.1}{3.3^2 \times 200*10^6} = 1.33\times 10^{-8}  \mathrm{F} \$

F is farads the unit for capacitance. 

I have assumed that the given equation takes power to be in watts.