If \(\frac{{{{\rm{x}}^3}{\rm{\;}} + {\rm{\;}}3{\rm{x}}}}{{3{{\rm{x}}^2}{\rm{\;}} + {\rm{\;}}1}}{\rm{\;}} = {\rm{\;}}\frac{{189}}{{61}}\) and y = 4x² – 17x + 16, then find the value of y.