741 Hz is the fifth of the six core Solfeggio frequencies, and in the sound-healing literature it is the tone associated with the throat centre and with "awakening intuition" and problem-solving, sometimes described as a tone of cleansing and self-expression. Like the rest of the set it belongs to a modern system assembled by Joseph Puleo and popularised in the 1999 Puleo and Horowitz book, derived by a numerological procedure rather than recovered from any ancient or medieval practice; the solfege syllables lent to the name come from the eleventh-century hymn tradition of Guido of Arezzo, which used no fixed hertz pitches and has no real connection to these numbers.
The mapping of the six tones onto the chakra centres, throat here, is a further modern layering of one recent esoteric scheme onto another. There is no scientific evidence for the claimed effects on intuition or expression, and nothing in this description is medical advice or a therapeutic claim; it reports a modern belief tradition.
Sources Healing Codes for the Biological ApocalypseLeonard G. Horowitz and Joseph S. Puleo with Claiming Knowledge: Strategies of Epistemology from Theosophy to the New AgeOlav Hammer