JSFiddle - React, Tailwind, and code Playground

JavaScript

var a = [[-786, 2], [-783, 1], [-782, 5], [-781, 1], [-779, 2], [-778, 1], [-775, 1], [-774, 1], [-773, 1], [-771, 2], [-769, 1], [-767, 1], [-766, 1], [-763, 2], [-760, 2]];


a.sort(function(a, b) {
    return b[1] - a[1];
});

console.log(a[0]);