Question: rearranging an equation

Hi, im relatively new to Maple and only use it occasionally to rearrange equations for further use. I would like to express the following equation in the form (V=...) but seem not able to. V(P,T) the equation should express volume V as function of P and T (pressure and temperature). b, c and d are constants EQN := V+b = (1/(V*(4*V-b)^3)-c*V-d)/(P*sqrt(T)*V^2) How can I do this? thanks for any help/suggestions
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