Cubic in the median of |X-1|

Let $X$ be a random variable with the probability density function $$f(x)=\begin{cases}\dfrac{3}{4}x(2-x),&0<x<2,\\0,&\text{otherwise.}\end{cases}$$ If $Z=|X-1|$ and $m$ is the median of $Z$, then $12m-4m^{3}$ equals __________ (in integer)