A harpsichord string is made of yellow brass (Young's modulus 90 GPa, tensile strength 0.63 GPa, mass density 8500 kg/m³). When tuned correctly, the tension in the string is 59.4 N, which is 93% of the maximum tension that the string can endure without breaking. The length of the string that is free to vibrate is 9.4 cm. What is the fundamental frequency?