Straight Lines and Pair of Straight Lines

Let ABC be a triangle with A($-$3, 1) and $\angle$ACB = $\theta$, 0 < $\theta$ < ${\pi \over 2}$. If the equation of the median through B is 2x + y $-$ 3 = 0 and the equation of angle bisector of C is 7x $-$ 4y $-$ 1 = 0, then tan$\theta$ is equal to :