We have recently shown that the high-pressure behavior of the isothermal compressibility, kappa(T), and the thermal expansion coefficient, alpha(p), can be characterized for molecular liquids from low-pressure measurements of these quantities together with surface tension data. The quality of the estimation was good enough to characterize the pressure behavior of the molar volume using a reference volume measured under orthobaric conditions. The same scheme is used here to predict the molar volume of some binary mixtures at different compositions as a function of pressure. Agreement with experimental data is good enough to predict the high-pressure behavior of the molar excess volume.