The resting potential of a mammalian nerve cell is -80 mV. A certain drug administered to the body changes the intracellular K⁺ concentration from 150 mmol/L to 55 mmol/L. The nearest value of cell membrane potential after the drug administration, assuming that the external equilibrium of K⁺ does not get changed during the event, is _______.
(Gas constant = 8.315 J/mol/K, core temperature = 37 °C and Faraday constant = 96500 C/mol)